MM News

New! MM Technical Services: MM’s Engineering Team will provide setup recommendations specifically tailored for your Mustang. Get help choosing options for a Maximum Grip Box, deciding on coil-over spring rates, selecting a brake master cylinder, and advice on converting your Fox to Hydroboost.

New! Swapping a Coyote into a Fox Mustang? MM's Hydroboost Conversion Kits allow easy installation of a 1996-2004 Mustang Hydroboost power brake assist unit into a 1979-1993 Mustang.

New! Swapping an IRS into your Fox Mustang? MM makes it easier with a brake line kit made just for this conversion. Bolts-in, with no cutting or flaring of brake lines. Designed to fit standard IRS brake hoses.

New! MM now offers a tool for the giant nut securing a Mustang Hydroboost. This MM socket fits the 1-7/8" nut holding the Hydroboost to the firewall mount. Required when changing a Hydroboost unit.

New! MM's billet aluminum Pedal Box Spacer for Fox Mustangs. Replace the breakage-prone OEM plastic spacer when converting to manual brakes or Hydroboost.

Canadians! Please read the latest about ordering from Canada/shipping to Canada.

We've posted the parts list and link to the video of MM's Mustang in /DRIVE Tuner car Shootout

Pedal Box Spacer, 1979-1993 Mustang
Actual product may differ from photo.
  • Pedal Box Spacer, 1979-1993 Mustang

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  • Item # MMBK-30

Select Option(s):

Shipping option



A direct replacement for the breakage-prone stock plastic spacer, the billet aluminum MM Pedal Box Spacer mounts between the pedal box and the firewall. Ever notice small, crumbled chunks of black plastic in the driver's side footwell of your Mustang? That would be pieces of your aging stock spacer. Breakage isn't surprising considering Fox Mustangs are now between 25 and 39 years old. We all know old plastic tends to get brittle, and even a careful person may find the original spacer broken after removing the pedal box. Not surprisingly, Ford made the spacers from steel for the SN95 Mustang, and they are now an integral part of the pedal box instead of a separate part.

The robust MM Pedal Box Spacer is located between the firewall and the pedal box. It's secured by the same four studs that pass through the firewall connecting the pedal box to the vacuum brake booster (or manual brake adapter block), or Hydroboost.

Why would I ever remove my pedal box?
  • During a conversion to manual brakes.
  • As part of a restoration.
  • To swap between an automatic and manual transmission.
  • While converting to the later model Hydroboost power brake booster.
  • To replace a damaged spacer that someone has unskillfully modified to install an SN95 vacuum brake booster.
Ordering Notes
When you're purchasing ONLY the MMBK-30, select one of these options:
  • Ship US Mail - At checkout the cart will show the standard shipping charge. We'll change that to the flat rate of $8.00 when we process your order.
  • Ship UPS - The item price is discounted $3.00.
When you're purchasing the MMBK-30 along with any other item, select:
  • I'm ordering more items - When you're purchasing the MMBK-30 along with any other item, the shipping charges displayed at checkout are for the entire order.
  • The only direct replacement available for the OEM plastic pedal box spacer.
  • Greatly improved durability; not breakable like the OEM plastic spacer.
  • The same thickness as the stock spacer to maintain correct pedal height.
  • Machined from billet aluminum for strength, durability, and light weight.
  • Same thickness as stock Fox plastic spacer.
  • Same hole pattern as stock Fox plastic spacer.
  • 1979-1993 Mustang
Does NOT fit Lincoln Mark VII.
We're working on FAQs for this product. If you have a question, please use our Contact Us page to email your question. We'll answer your question by return email, and also consider it for possible addition to this FAQ section.